INCOME TAXES (Details ) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income tax Expense Benefit
Loss before recovery of income taxes	$ (394,228)	$ (18,000)	$ (236,263)
Current:
Total	63,526	39,891	27,333
Deferred:
Total	(341,729)	(217,450)	(55,403)
Provision for (recovery of) income taxes	(278,203)	(177,559)	(28,070)
Canada
Income tax Expense Benefit
Domestic	(205,612)	(41,374)	(127,269)
Current:
Domestic	7,189	3,554	5,860
Deferred:
Domestic	(11,886)	(21,763)	(49,820)
Outside of Canada
Income tax Expense Benefit
Foreign	(188,616)	23,374	(108,994)
Current:
Foreign	56,337	36,337	21,473
Deferred:
Foreign	$ (329,843)	$ (195,687)	$ (5,583)